Test device for slope damage analysis under the coupling of ground motion and bedrock dislocation

Abstract

The present invention discloses a slope damage analysis and testing device under the coupled effects of earthquake motion and bedrock dislocation, comprising an earthquake motion system and a bedrock fault dislocation system. The earthquake motion system comprises a vibration table, a vibration table surface, a vertical actuator, and a horizontal actuator to achieve bidirectional earthquake motion input. The bedrock fault dislocation system comprises a lifting box, a fixed box, a slope adjustment actuator, an inclination adjustment reaction device, and a jacking actuator. The slope adjustment actuator lifts the lifting box to achieve the desired slope gradient, and the jacking actuator loads the movable bottom plate of the lifting box to achieve relative fault dislocation. The simultaneous operation of the earthquake motion system and the bedrock fault dislocation system enables a slope damage analysis test under the coupled effects of earthquake motion and bedrock dislocation. The present invention simulates the instability and deformation characteristics of a slope under the coupled effects of earthquake motion and bedrock dislocation, and both the slope gradient and the inclination angle of the fault can be controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of large-scale slope model testing under earthquake action, and in particular to a slope earthquake damage analysis and testing device under the coupling action of earthquake motion and bedrock dislocation. Background Art

[0002] Extensive earthquake damage investigations have shown that earthquake-induced slope instability and sliding are among the major seismic geological hazards in mountainous and hilly areas. Seismic slope instability is characterized by widespread distribution, high numbers, and significant damage, resulting in significant casualties and economic losses. Seismic motion near strong earthquake fault zones is high in energy, and slopes are densely populated. Damage is particularly severe when relative fault movement or relative motion between two plates leads to direct "cutting" of slopes. Therefore, slope failure caused by the combined effects of seismic motion and bedrock dislocation has become an urgent problem that needs to be addressed. Indoor model testing is an effective method for investigating seismic slope instability.

[0003] At present, many scholars' research on seismic slope model tests has the following shortcomings: First, most methods place the slope model on a shaking table, without considering the impact of bedrock fault dislocation or even multi-angle dislocation on slope instability; second, the preparation of slope models with different slopes in the past is cumbersome and complex, and the performance of simulating real stress conditions is generally poor; and finally, the slope model is small in size and cannot truly reproduce the slope damage and instability process under earthquake action. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of existing devices and provide a slope damage analysis test device under the coupling of earthquake motion and bedrock dislocation, thereby simulating the damage and instability of a slope with a certain slope under the action of earthquake motion and fault dislocation of different angles, and promoting the development and innovation of the dynamic theory of slope under earthquake action.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] The invention relates to a slope damage analysis test device under the coupling action of earthquake motion and bedrock dislocation, which comprises an earthquake motion action system realized based on a shaking table and a bedrock fault dislocation system arranged on the shaking table.

[0007] The seismic action system includes a vibration table, a vibration table surface, a vertical actuator and a horizontal actuator. Multiple vertical actuators are provided on the lower surface of the vibration table surface, and a horizontal actuator is provided at one end of the vibration table surface. The vertical actuator and the horizontal actuator are fixed on the vibration table; the above components are used to realize bidirectional seismic input.

[0008] The bedrock fault displacement system is installed on a vibrating table and primarily consists of a lifting box, a fixed box, a slope adjustment actuator, an inclination adjustment reaction device, and a push actuator. The fixed box is fixed to the vibrating table and hinged to the lifting box. The lifting box is equipped with a slope adjustment actuator, which lifts the lifting box to achieve the desired slope. The lifting box's bottom plate consists of a movable bottom plate and a fixed bottom plate. The push actuator loads the movable bottom plate of the lifting box to achieve relative fault displacement.

[0009] Furthermore, the lifting box also includes a rear box plate and a pair of side panels; the movable bottom plate is located on the rear side, and the fixed bottom plate is located on the front side, and a certain gap is left between the movable bottom plate and the fixed bottom plate, the side panel and the rear box panel; high-strength angle steels are respectively provided at the four corners of the bottom of the movable bottom plate; the two ends of the fixed bottom plate are respectively fixedly connected to the side panels, and a bearing hinge interface is provided at the front end of the fixed bottom plate for hinged connection with the fixed box; a support bracket is provided on the side panel, and the support bracket is hinged to the slope adjustment actuator, and the bottom of the slope adjustment actuator is locked to the vibration table by high-strength bolts and nuts; the lifting ring is fixed on the steel ribs at the four corners of the upper part of the side panel.

[0010] Furthermore, the fixed box includes a front box plate, a fixed side panel, and a fixed box bottom plate. The front box plate, the fixed side panel, and the fixed box bottom plate are welded together as one and locked to the vibration table surface through high-strength bolts and nuts. The rear end of the fixed box bottom plate is provided with an articulated bearing device and is connected to the vibration table surface through high-strength bolts and nuts.

[0011] The front bearing hinge interface of the fixed bottom plate of the lifting box and the rear end hinge bearing device of the fixed box bottom plate of the fixed box are hinged on the vibration table; the side panel of the lifting box is embedded in the fixed side panel of the fixed box.

[0012] Furthermore, the four inclination adjustment reaction devices are locked on the vibration table surface and under the movable bottom plate of the lifting box by high-strength bolts and nuts. The four inclination adjustment reaction devices have multi-angle holes. The bottoms of the four push actuators are detachably connected to the multi-angle holes, and the top of the push actuator is detachably connected to the hinged joint at the bottom of the movable bottom plate of the lifting box.

[0013] By loading the lifting box with a slope adjustment actuator, slope models with different slopes can be simulated. The two ends of the high-strength fixed steel rod are fixed to the lifting box and the vibration table respectively by high-strength bolts and nuts; the inclination adjustment reaction device and the thrust actuator can simulate dislocation tests with fault inclination angles of 30°, 45°, 60° and 90°; by the simultaneous operation of the seismic action system and the bedrock fault dislocation system installed on the vibration table, the slope seismic damage analysis test under the coupling action of seismic motion and bedrock dislocation can be realized.

[0014] Compared with the existing technology, the present invention has the following beneficial effects:

[0015] The present invention can realize slope model testing under the coupled action of earthquake motion and bedrock dislocation at a large scale, and can provide technical support for the seismic fortification of actual slope projects; the present invention can conveniently realize slope models with different slopes through a slope adjustment actuator, saving manpower and materials, and having high restoration and authenticity; the present invention can perform dislocations with different fault inclinations on the basis of a slope with a certain slope, with simple operation and rich test conditions; the test results of the device of the present invention can reveal the deformation mode and instability mechanism of the earthquake slope to a certain extent, and promote the development and innovation of the dynamic theory of cross-fault slopes under earthquake action. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the device of the present invention;

[0017] Figure 2 Schematic diagram of the lifting box structure in the device of the present invention;

[0018] Figure 3 Schematic diagram of the bottom plate structure of the lifting box in the device of the present invention;

[0019] Figure 4 It is a schematic diagram of the fixed box structure in the device of the present invention;

[0020] Figure 5 Schematic diagram of the angle adjustment reaction frame structure in the device of the present invention;

[0021] In the figure: 1. Vibrating table; 2. Lifting box; 3. Fixed box; 4. Slope adjustment actuator; 5. Tilt adjustment reaction device; 6. Push actuator; 7. High-strength bolts and nuts; 8. High-strength fixed steel rod; 1-1. Vibrating table surface; 1-2. Vertical actuator; 1-3. Horizontal actuator; 2-1. Rear box panel; 2-2. Side panel; 2-3. Movable bottom plate; 2-4. Fixed bottom plate; 2-5. High-strength angle steel; 2-6. Support bracket; 2-7. Lifting ring; 2-8. Bearing hinge interface; 2-9. Hinge joint; 3-1. Front box panel; 3-2. Fixed side panel; 3-3. Fixed box bottom plate; 3-4. Articulated bearing device; 5-1. Multi-angle hole position. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0023] like Figure 1-5As shown, the test device for analyzing slope damage under the coupled effects of earthquake motion and bedrock dislocation includes a earthquake motion system implemented based on a vibration table 1 and a bedrock fault displacement system installed on the vibration table 1. The earthquake motion system includes the vibration table 1, the vibration table surface 1-1, the vertical actuator 1-2, and the horizontal actuator 1-3, and the above components are used to realize bidirectional earthquake motion input. The bedrock fault displacement system is installed on the vibration table 1 and mainly includes a lifting box 2, a fixed box 3, a slope adjustment actuator 4, an inclination adjustment reaction device 5, and a push actuator 6. The required slope gradient is achieved by lifting the lifting box 2 through the slope adjustment actuator 4, and the relative displacement of the fault is achieved by loading the movable bottom plate 2-3 of the lifting box 2 through the push actuator 6.

[0024] like Figure 1-3 As shown, the lifting box 2 includes a rear box plate 2-1, a side panel 2-2, a movable bottom plate 2-3, a fixed bottom plate 2-4, a high-strength angle steel 2-5, a support bracket 2-6 and a lifting ring 2-7; a certain gap is left between the movable bottom plate 2-3 and the fixed bottom plate 2-4, the side panel 2-2 and the rear box plate 2-1, and is supported at the four corners of the bottom of the box by four high-strength angle steels 2-5; the fixed bottom plate 2-4 and the side panel 2-2 are welded as a whole, and a bearing hinge interface 2-8 is provided at the front end of the fixed bottom plate 2-4; the support brackets 2-6 on both sides of the lifting box 2 are welded and fixed to the steel ribs of the side panel 2-2, and the support brackets 2-6 are hinged to the slope adjustment actuator 4, and the bottom of the slope adjustment actuator 4 is locked on the vibration table 1-1 by high-strength bolts and nuts 7; the lifting ring 2-7 is welded to the steel ribs at the four upper corners of the side panel 2-2 of the lifting box 2.

[0025] The fixed box 3 includes a front box plate 3-1, a fixed side panel 3-2, and a fixed box bottom plate 3-3. The front box plate 3-1, the fixed side panel 3-2, and the fixed box bottom plate 3-3 are welded together as a whole and locked on the vibration table 1-1 through high-strength bolts and nuts 7. The rear end of the bottom plate of the fixed box 3 is provided with a hinged bearing device 3-4 and is connected to the vibration table 1-1 through high-strength bolts and nuts 7.

[0026] The front end bearing hinge interface 2-8 of the fixed bottom plate 2-4 of the lifting box 2 and the rear end hinge bearing device 3-4 of the fixed box bottom plate 3-3 of the fixed box 3 are hinged on the vibration table 1-1; the side panel 2-2 of the lifting box 2 is embedded in the fixed side panel 3-2 of the fixed box 3.

[0027] Furthermore, the four inclination adjustment reaction devices 5 are locked on the vibration table 1-1 and below the movable bottom plate 2-3 of the lifting box 2 by high-strength bolts and nuts 7. The four inclination adjustment reaction devices 5 are provided with multi-angle holes 5-1. The bottoms of the four pushing actuators 6 are detachably connected to the multi-angle holes 5-1. The tops of the pushing actuators 6 are detachably connected to the hinged joint 2-9 at the bottom of the movable bottom plate 2-3 of the lifting box 2.

[0028] Furthermore, by loading the lifting box 2 with the slope adjustment actuator 4, slope models with different slopes can be simulated, and the two ends of the high-strength fixed steel rod 8 are fixed to the lifting box 2 and the vibration table 1-1 respectively by high-strength bolts and nuts 7; by the inclination adjustment reaction device 5 and the thrust actuator 6, dislocation tests with fault inclination angles of 30°, 45°, 60° and 90° can be simulated; by the simultaneous operation of the seismic action system and the bedrock fault dislocation system provided on the vibration table 1, the slope seismic damage analysis test under the coupling action of seismic motion and bedrock dislocation can be realized.

[0029] When using the slope damage analysis test device under the coupling effect of earthquake motion and bedrock dislocation of the present invention to conduct a test, the following steps are included:

[0030] S1. Fasten the assembled and welded fixing box 3 to the vibration table 1-1 with high-strength bolts and nuts 7, and connect the front end hinged bearing device 3-4 of the fixing box bottom plate 3-3 to the vibration table 1-1 with high-strength bolts and nuts 7.

[0031] S2. Weld and fix the support brackets 2-6 on both sides of the lifting box 2 to the steel ribs of the side panel 2-2, and connect them to the slope adjustment actuator 4. The bottom of the slope adjustment actuator 4 is locked on the vibration table 1-1 by high-strength bolts and nuts 7; place the movable bottom plate 2-3 stably on the high-strength angle steel 2-5, and the gaps between the movable bottom plate 2-3 and the fixed bottom plate 2-4, the side panel 2-2 and the rear box plate 2-1 are pasted with visible thick polyethylene plastic cloth; lift the lifting ring of the lifting box 2, and hinge the front end bearing hinge interface 2-8 of the fixed bottom plate 2-5 of the lifting box 2 and the front end hinge bearing device 3-4 of the fixed box bottom plate 3-3 of the fixed box 3 on the vibration table 1-1.

[0032] S3. Lift the lifting box 2 through the slope adjustment actuator 4 to reach the slope required for the slope model test, and fix the two ends of the high-strength fixed steel rod 8 to the lifting box 2 and the vibration table 1-1 respectively through high-strength bolts and nuts 7; fill the lifting box 2 and the fixing box 3 with model soil or other models and arrange sensors until the expected height is reached.

[0033] S4. Fasten the four inclination adjustment reaction force devices 5 to the vibration table 1-1 through high-strength positioning bolts and nut locks 7; install the push actuator 6 according to the required fault displacement inclination angle.

[0034] S5. Simultaneously operate the vibration table 1 and the jacking hydraulic press 6 to realize the slope instability and destruction process under the coupling effect of earthquake motion and bedrock dislocation.

[0035] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A test device for analyzing slope damage under the coupling of earthquake motion and bedrock dislocation, characterized by: It includes a seismic action system based on a vibration table (1) and a bedrock fault dislocation system arranged on the seismic action system; The seismic action system comprises a vibration table (1), a vibration table surface (1-1), a vertical actuator (1-2) and a horizontal actuator (1-3), wherein a plurality of vertical actuators (1-2) are provided on the lower surface of the vibration table surface (1-1), a horizontal actuator (1-3) is provided at one end of the vibration table surface (1-1), and the vertical actuator (1-2) and the horizontal actuator (1-3) are fixed on the vibration table (1); the seismic action system is used to realize bidirectional seismic input; The bedrock fault dislocation system includes a lifting box (2) and a fixed box (3), wherein the fixed box (3) is fixed on a vibration table (1-1), the lifting box (2) and the fixed box (3) are hinged, and the lifting box (2) is provided with a slope adjustment actuator (4), and the slope adjustment actuator (4) is used to lift the lifting box (2) to achieve the required slope; The bottom plate of the lifting box (2) is divided into a movable bottom plate (2-3) and a fixed bottom plate (2-4), and the movable bottom plate (2-3) of the lifting box (2) is loaded by a push actuator (6) to realize relative displacement of the fault; The lifting box (2) further comprises a rear box plate (2-1) and a pair of side panels (2-2); the movable bottom plate (2-3) is located at the rear side, the fixed bottom plate (2-4) is located at the front side, and a certain gap is left between the movable bottom plate (2-3) and the fixed bottom plate (2-4), the side panels (2-2) and the rear box plate (2-1); High-strength angle steels (2-5) are respectively provided at the four corners of the bottom of the movable bottom plate (2-3); The two ends of the fixed bottom plate (2-4) are respectively fixedly connected to the side panels (2-2), and the front end of the fixed bottom plate (2-4) is provided with a bearing hinge interface (2-8) for hinge connection with the fixed box (3); A support bracket (2-6) is provided on the side panel (2-2), the support bracket (2-6) is hinged to the slope adjustment actuator (4), and the bottom of the slope adjustment actuator (4) is locked on the vibration table (1-1) through high-strength bolts and nuts (7); the lifting ring (2-7) is fixed to the steel ribs at the four corners of the upper part of the side panel (2-2); The fixed box (3) includes a front box plate (3-1), a fixed side panel (3-2), and a fixed box bottom plate (3-3). The front box plate (3-1), the fixed side panel (3-2), and the fixed box bottom plate (3-3) are fixedly connected to each other as a whole and are locked on the vibration table (1-1) through high-strength bolts and nuts (7). The rear end of the bottom plate of the fixed box (3) is provided with an articulated bearing device (3-4) for articulating with the front end bearing hinge interface (2-8) of the lifting box (2). The bottom plate of the fixed box (3) is connected to the vibration table (1-1) through high-strength bolts and nuts (7); After the lifting box (2) is lifted, the side panel (2-2) of the lifting box (2) is embedded in the fixed side panel (3-2) of the fixed box (3); The four tilt adjustment reaction devices (5) are fastened to the vibration table (1-1) by high-strength bolts and nuts (7) and are located below the movable bottom plate (2-3) of the lifting box (2). The four tilt adjustment reaction devices (5) are provided with multi-angle holes (5-1). The bottoms of the four push actuators (6) are detachably connected to the multi-angle holes (5-1). The tops of the push actuators (6) are detachably connected to the hinge joint (2-9) at the bottom of the movable bottom plate (2-3) of the lifting box (2).

2. The slope damage analysis test device under the coupling of ground motion and bedrock dislocation according to claim 1 is characterized by: It also includes a high-strength fixed steel rod (8), both ends of which are fixed to the lifting box (2) and the vibration table (1-1) through high-strength bolts and nuts (7) respectively.

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